<template>
	<view class="searchLayout">
		<view class="search">
			<uni-search-bar @confirm="onSearch" @cancel="onClear" @clear="onClear" focus placeholder="搜索"
				v-model="queryParams.keyword">
			</uni-search-bar>
		</view>


		<view>
			<view class="history" v-if="historySearch.length">
				<view class="topTitle">
					<view class="text">最近搜索</view>
					<view class="icon" @click="removeHistory">
						<uni-icons type="trash" size="25"></uni-icons>
					</view>
				</view>
				<view class="tabs">
					<view class="tab" v-for="tab in historySearch" :key="tab" @click="clickTab(tab)">{{ tab }}</view>
				</view>
			</view>

			<view class="recommend">
				<view class="topTitle">
					<view class="text">热门搜索</view>
				</view>
				<view class="tabs">
					<view class="tab" v-for="tab in recommendList" :key="tab" @click="clickTab(tab)">{{ tab }}</view>
				</view>
			</view>
		</view>


		<view class="noSearch" v-if="noSearch">
			<uv-empty mode="search" icon="http://cdn.uviewui.com/uview/empty/search.png"></uv-empty>
		</view>


		<view v-else>
			<view class="list">
				<navigator :url="`/pages/preview/preview?id=${item._id}`" class="item" v-for="item in classList"
					:key="item._id">
					<image :src="item.smallPicurl" mode="aspectFill"></image>
				</navigator>
			</view>
			<view class="load" v-if="noData || classList.length"><uni-load-more
					:status="noData ? 'noMore' : 'loading'" /></view>
		</view>


	</view>
</template>

<script setup>
import { ref } from "vue";
import { onLoad, onUnload, onReachBottom } from "@dcloudio/uni-app";
import { ApiSearch } from "@/api/apis.js";
//查询参数
const queryParams = ref({
	pageNum: 1,
	pageSize: 12,
	keyword: ""
})

//搜索历史词
const historySearch = ref(uni.getStorageSync('historySearch') || []);

//热门搜索词
const recommendList = ref(["美女", "帅哥", "宠物", "卡通"]);

//没有更多
const noData = ref(false);
//没有搜索结果
const noSearch = ref(false);

//搜索结果列表
const classList = ref([]);

const searchData = async () => {
	try {
		const res = await ApiSearch(queryParams.value)
	classList.value = [...classList.value, ...res.data]
	if (res.data.length < queryParams.value.pageSize) {
		noData.value = true
	}
	if (res.data.length === 0 && classList.value.length === 0) {
		noSearch.value = true
	}
	uni.setStorageSync('classList', classList.value)
	}finally{
		uni.hideLoading()
	}
}
// 初始化 
const init = (options = '') => {
	classList.value = []
	queryParams.value = {
		pageNum: 1,
		pageSize: 12,
		keyword: options || " "
	}
	noData.value = false
	noSearch.value = false
}

//点击搜索
const onSearch = () => {
	uni.showLoading({
		title: '加载中',
		mask: false
	})
	historySearch.value = [...new Set([queryParams.value.keyword, ...historySearch.value])].slice(0,10)
	init(queryParams.value.keyword)
	uni.getStorageSync('historySearch', historySearch.value)
	searchData()
}

//点击清除按钮
const onClear = () => {
	init()
}



//点击标签进行搜索
const clickTab = (value) => {
	// console.log(value);
	init(value) 
	onSearch()

}


//点击清空搜索记录
const removeHistory = () => {
	uni.showModal({
		title: "是否清空历史搜索？",
		success: res => {
			if (res.confirm) {
				uni.removeStorageSync('historySearch')
				historySearch.value = []
			}
		}
	})
}

//触底加载更多
onReachBottom(() => {
	if (noData.value) return
	queryParams.value.pageNum++
	searchData()
})

//关闭有页面 
onUnload(() => {
	uni.removeStorageSync('classList', classList.value)
})


</script>

<style lang="scss" scoped>
.searchLayout {
	.search {
		padding: 0 10rpx;
	}

	.topTitle {
		display: flex;
		justify-content: space-between;
		align-items: center;
		font-size: 32rpx;
		color: #999;
	}

	.history {
		padding: 30rpx;
	}

	.recommend {
		padding: 30rpx;
	}

	.tabs {
		display: flex;
		align-items: center;
		flex-wrap: wrap;
		padding-top: 20rpx;

		.tab {
			background: #F4F4F4;
			font-size: 28rpx;
			color: #333;
			padding: 10rpx 28rpx;
			border-radius: 50rpx;
			margin-right: 20rpx;
			margin-top: 20rpx;
		}
	}

	.list {
		display: grid;
		grid-template-columns: repeat(3, 1fr);
		gap: 5rpx;
		padding: 20rpx 5rpx;

		.item {
			height: 440rpx;

			image {
				width: 100%;
				height: 100%;
				display: block;
			}
		}
	}
}
</style>
